I've recently accidentally read a string of sci-fi books that deal with existentialism/mortality/entropy/etc. and would like to continue that theme. Can you recommend something?
The books on this theme that I've read recently:
Death's End by Liu Cixin
Exhalation by Ted Chiang (specifically, the short story of the same name)
We by Yevgeny Zamyatin (this was more about society, but I was also interested in the theme regarding the entropy of human happiness)
I'm specifically looking for sci-fi as that's my preferred genre.